Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Patent
1996-07-10
1998-11-03
Letscher, Geraldine
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
430502, 430503, 430505, 430543, 430552, 430553, 430554, 430555, 430567, G03C 146
Patent
active
058306285
ABSTRACT:
A colour photographic silver halide material with at least two blue-sensitive, yellow-coupling silver halide emulsion layers of differing photographic sensitivity, at least two green-sensitive, magenta-coupling silver halide emulsions layers of differing photographic sensitivity and at least two red-sensitive, cyan-coupling silver halide emulsion layers of differing photographic sensitivity, at least one interlayer Z-1 below the lowermost red-sensitive silver halide emulsion layer and/or at least one interlayer Z-2 below the lowermost green-sensitive silver halide emulsion layer, in which material a coupler is additionally used in at least one silver halide emulsion layer, which coupler couples to yield a colour which is not complementary to the spectral sensitisation of the layer concerned, and Z-1 and/or Z-2 contain a silver halide emulsion which has tabular grains with an aspect ratio of >2, an average diameter of a sphere of equal volume of .gtoreq.0.3 .mu.m and a diameter of a circle of equal projected surface area of the tabular grains of .gtoreq.0.3 .mu.m, is distinguished by improved sensitivity and an improved sensitivity/grain ratio.
REFERENCES:
patent: 4614707 (1986-09-01), Fujita et al.
patent: 4705744 (1987-11-01), Sasaki et al.
patent: 4751174 (1988-06-01), Toya
patent: 5571663 (1996-11-01), Hirai
Bell Peter
Borst Hans-Ulrich
Brennecke Detlef
Buscher Ralf
Willsau Johannes
Agfa-Geuaert
Letscher Geraldine
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